| Autor: |
B-Y, Lee, D J, Penman, T D, Kocher |
| Rok vydání: |
2003 |
| Předmět: |
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| Zdroj: |
Animal genetics. 34(5) |
| ISSN: |
0268-9146 |
| Popis: |
Sex determination in the Nile tilapia (Oreochromis niloticus) is thought to be an XX-XY (male heterogametic) system controlled by a major gene. We searched for DNA markers linked to this major locus using bulked segregant analysis. Ten microsatellite markers belonging to linkage group 8 were found to be linked to phenotypic sex. The putative Y-chromosome alleles correctly predict the sex of 95% of male and female individuals in two families. Our results suggest a major sex-determining locus within a few centimorgans of markers UNH995 and UNH104. A third family from the same population showed no evidence for linkage of this region with phenotypic sex, indicating that additional genetic and/or environmental factors regulate sex determination in some families. These markers have immediate utility for studying the strength of different Y chromosome alleles, and for identifying broodstock carrying one or more copies of the Y haplotype. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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